The 2015 Ford Mustangs in this analysis were driven mostly on the highway at an average speed of 80 miles per hour (about 25 percent of the miles driven). The rest of the miles were in the city (5 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).

In addition, the average 2015 Ford Mustang in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.

TrueDelta Reviews the Real Gas Mileage of the 2015 Ford Mustang

2015 Ford Mustang Real Gas Mileage: Cons

Year

Comment

The performance of these cars is not without an obvious tradeoff. In EPA tests, the Mustang GT manages only 15 mpg city, but 25 mpg highway, with the manual transmission. With the optional six-speed automatic, the car can go a mile farther per gallon in the city. The Audi rates a little better in the city, but worse on the highway: 16/23.
In my real-world suburban driving, the Mustang's trip computer most often reported averages in the 16-17 range. With a light foot I could nudge the average over 20, and even as high as 24, but what's the point of driving a Mustang GT like you would (or at least should) a Prius? On a 70-mph highway, with the big V8 spinning under 2,000 rpm in top gear, the trip computer reported a fairly impressive (for such a large, powerful engine in a fairly heavy car) 28 mpg.
But if you want decent fuel economy in either car, you'll have to ditch the V8. The new EcoBoost four-cylinder achieves 22/31 with a manual transmission and 21/32 with the automatic. The Audi manages similar figures with a 220-horsepower 2.0T four-cylinder engine, but 17/26 with the manual and 18/28 with the automated dual-clutch transmission and the S5's supercharged V6.
see full Ford Mustang review

What Our Members Are Saying about the Real Gas Mileage of the 2015 Ford Mustang

None of our members have yet commented on the real gas mileage of the 2015 Ford Mustang.

2015 Ford Mustang Gas Mileage (MPG)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and
where a car was driven. So you can get an idea of the Ford Mustang's
real-world MPG based on how and where you drive a car.